CVE-2017-7901
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:P/I:P/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
AI Score
Confidence
High
EPSS
Percentile
15.7%
A Predictable Value Range from Previous Values issue was discovered in Rockwell Automation Allen-Bradley MicroLogix 1100 programmable-logic controllers 1763-L16AWA, Series A and B, Version 16.00 and prior versions; 1763-L16BBB, Series A and B, Version 16.00 and prior versions; 1763-L16BWA, Series A and B, Version 16.00 and prior versions; and 1763-L16DWD, Series A and B, Version 16.00 and prior versions and Allen-Bradley MicroLogix 1400 programmable logic controllers 1766-L32AWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWA, Series A and B, Version 16.00 and prior versions; 1766-L32BWAA, Series A and B, Version 16.00 and prior versions; 1766-L32BXB, Series A and B, Version 16.00 and prior versions; 1766-L32BXBA, Series A and B, Version 16.00 and prior versions; and 1766-L32AWAA, Series A and B, Version 16.00 and prior versions. Insufficiently random TCP initial sequence numbers are generated, which may allow an attacker to predict the numbers from previous values. This may allow an attacker to spoof or disrupt TCP connections, resulting in a denial of service for the target device.
Affected configurations
| Vendor | Product | Version | CPE |
|---|---|---|---|
| rockwellautomation | 1763-l16awa_series_a | * | cpe:2.3:a:rockwellautomation:1763-l16awa_series_a:*:*:*:*:*:*:*:* |
| rockwellautomation | 1763-l16awa_series_b | * | cpe:2.3:a:rockwellautomation:1763-l16awa_series_b:*:*:*:*:*:*:*:* |
| rockwellautomation | 1763-l16bbb_series_a | * | cpe:2.3:a:rockwellautomation:1763-l16bbb_series_a:*:*:*:*:*:*:*:* |
| rockwellautomation | 1763-l16bbb_series_b | * | cpe:2.3:a:rockwellautomation:1763-l16bbb_series_b:*:*:*:*:*:*:*:* |
| rockwellautomation | 1763-l16bwa_series_a | * | cpe:2.3:a:rockwellautomation:1763-l16bwa_series_a:*:*:*:*:*:*:*:* |
| rockwellautomation | 1763-l16bwa_series_b | * | cpe:2.3:a:rockwellautomation:1763-l16bwa_series_b:*:*:*:*:*:*:*:* |
| rockwellautomation | 1763-l16dwd_series_a | * | cpe:2.3:a:rockwellautomation:1763-l16dwd_series_a:*:*:*:*:*:*:*:* |
| rockwellautomation | 1763-l16dwd_series_b | * | cpe:2.3:a:rockwellautomation:1763-l16dwd_series_b:*:*:*:*:*:*:*:* |
| rockwellautomation | ab_micrologix_controller | 1100 | cpe:2.3:h:rockwellautomation:ab_micrologix_controller:1100:*:*:*:*:*:*:* |
| rockwellautomation | 1766-l32awa_series_a | * | cpe:2.3:a:rockwellautomation:1766-l32awa_series_a:*:*:*:*:*:*:*:* |
Related
CVSS2
Attack Vector
NETWORK
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
COMPLETE
AV:N/AC:L/Au:N/C:P/I:P/A:C
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
LOW
Integrity Impact
LOW
Availability Impact
HIGH
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
AI Score
Confidence
High
EPSS
Percentile
15.7%